Why teach otherwise? It is a strong signal to click the [-] next to that comment thread. Strong ignore signal is as good as strong read signal. It's only weak signal that is problematic.

It's sort of like all those Amazon reviews that used to say "In exchange for an honest and unbiased review, I received the product". Before Amazon auto-removed them, they were a strong negative quality signal.

I would prefer if we preserve high comment SNR by encouraging people to use standard comms patterns so that my automatic comment bucketing will allow me to skip non-useful comments, e.g. correlation is not causation, survivorship bias, etc.